package day4;
//测试Object
public class TestObject {
    public static void main(String[] args) {
        //第一类：对象类
        TestObject t1=new TestObject();
        TestObject t2=t1;
        TestObject t3=new TestObject();
        System.out.println("t1"+t1.hashCode());
        System.out.println("t2"+t2.hashCode());
        System.out.println("t3"+t3.hashCode());
        //第二类：基本类型封装类(Integer Long...)
        Integer num=1000;
        Integer num2=new Integer(1000);
        Long num3=1000l;
        System.out.println("num:"+num.hashCode());
        System.out.println("num2:"+num2.hashCode());
        System.out.println("num3:"+num3.hashCode());
        //第三类:String类,可能会出现bug
        //哈希冲突：值是不同的 但是hashcode反而相同
        String s1="java";
        String s2=new String("java");
        System.out.println("s1"+s1.hashCode());
        System.out.println("s2"+s2.hashCode());
        String s3="重地";
        String s4="通话";
        System.out.println("s3"+s3.hashCode());
        System.out.println("s4"+s4.hashCode());
    }
}
